NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Aniline (and homologs)



Synonyms & Trade Names

Aminobenzene, Aniline oil, Benzenamine, Phenylamine
DOT ID & Guide
1547 / 153


NIOSH REL: Ca See Appendix A
OSHA PEL: TWA 5 ppm (19 mg/m3) [skin]
Ca [100 ppm] See: 62533
1 ppm = 3.81 mg/m3
Physical Description
Colorless to brown, oily liquid with an aromatic amine-like odor. [Note: A solid below 21°F.]
MW: 93.1
BP: 363°F
FRZ: 21°F
Sol: 4%
VP: 0.6 mmHg
IP: 7.70 eV

Sp.Gr: 1.02
Fl.P: 158°F
UEL: 11%
LEL: 1.3%

Class IIIA Combustible Liquid: Fl.P. at or above 140F and below 200F.
Incompatibilities & Reactivities

Strong oxidizers, strong acids, toluene diisocyanate, alkalis
Measurement Methods
NIOSH 2002, 2017, 8317; OSHA PV2079
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: No recommendation
Provide: Quick drench
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Soap wash promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations
At concentrations above the NIOSH REL, or where there is no REL, at any detectable concentration:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Headache, lassitude (weakness, exhaustion), dizziness; cyanosis; ataxia; dyspnea (breathing difficulty) on effort; tachycardia; irritation eyes; methemoglobinemia; cirrhosis; [potential occupational carcinogen]
Target Organs
Blood, cardiovascular system, eyes, liver, kidneys, respiratory system

Cancer Site
[bladder cancer]
See also: INTRODUCTION   See ICSC CARD: 0011   See MEDICAL TESTS: 0014